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Title: Probing effective field theory operators in the associated production of top quarks with a Z boson in multilepton final states at √s = 13 TeV
Authors: Tonon, N
Aarup Petersen, H
Aldaya Martin, M
Asmuss, P
Baxter, S
Bayatmakou, M
Behnke, O
Bermúdez Martínez, A
Bhattacharya, S
Bin Anuar, AA
Borras, K
Pitzl, D
Raspereza, A
Ribeiro Lopes, B
Rübenach, J
Saggio, A
Saibel, A
Savitskyi, M
Scham, M
Scheurer, V
Schütze, P
Schwanenberger, C
Singh, A
Sosa Ricardo, RE
Stafford, D
Van De Klundert, M
Walsh, R
Walter, D
Wen, Y
Wichmann, K
Wiens, L
Wissing, C
Wuchterl, S
Tumasyan, A
Adam, W
Andrejkovic, JW
Bergauer, T
Chatterjee, S
Dragicevic, M
Escalante Del Valle, A
Frühwirth, R
Jeitler, M
Krammer, N
Lechner, L
Liko, D
Mikulec, I
Paulitsch, P
Pitters, FM
Schieck, J
Schöfbeck, R
Schwarz, D
Templ, S
Waltenberger, W
Wulz, CE
Chekhovsky, V
Litomin, A
Makarenko, V
Darwish, MR
De Wolf, EA
Coldham, K
Cole, JE
Khan, A
Kyberd, P
Reid, ID
Teodorescu, L
Zahid, S
CMS Collaboration
Brunner, D
Campbell, A
Cardini, A
Cheng, C
Colombina, F
Consuegra Rodríguez, S
Correia Silva, G
Danilov, V
De Silva, M
Didukh, L
Eckerlin, G
Eckstein, D
Estevez Banos, LI
Filatov, O
Gallo, E
Geiser, A
Giraldi, A
Grohsjean, A
Guthoff, M
Jafari, A
Jomhari, NZ
Jung, H
Kasem, A
Kasemann, M
Kaveh, H
Kleinwort, C
Krücker, D
Lange, W
Lidrych, J
Lipka, K
Lohmann, W
Mankel, R
Melzer-Pellmann, IA
Mendizabal Morentin, M
Metwally, J
Meyer, AB
Meyer, M
Mnich, J
Mussgiller, A
Otarid, Y
Pérez Adán, D
Keywords: hadron-hadron scattering (experiments);Top physics
Issue Date: 13-Dec-2021
Publisher: Springer Nature on behalf of SISSA
Citation: CMS collaboration., Tonon, N. et al. (2021) 'Probing effective field theory operators in the associated production of top quarks with a Z boson in multilepton final states at √s = 13 TeV', Journal of High Energy Physics, 2021 (12), 083, pp. 1-55. doi: 10.1007/JHEP12(2021)083.
Abstract: Copyright © CERN, for the benefit of the CMS Collaboration. A search for new top quark interactions is performed within the framework of an effective field theory using the associated production of either one or two top quarks with a Z boson in multilepton final states. The data sample corresponds to an integrated luminosity of 138 fb−1 of proton-proton collisions at s = 13 TeV collected by the CMS experiment at the LHC. Five dimension-six operators modifying the electroweak interactions of the top quark are considered. Novel machine-learning techniques are used to enhance the sensitivity to effects arising from these operators. Distributions used for the signal extraction are parameterized in terms of Wilson coefficients describing the interaction strengths of the operators. All five Wilson coefficients are simultaneously fit to data and 95% confidence level intervals are computed. All results are consistent with the SM expectations. [Figure not available: see fulltext.]
Description: A preprint version of the article is available at arXiv (
ISSN: 1126-6708
Other Identifiers: 083
Appears in Collections:Dept of Electronic and Computer Engineering Research Papers

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